$(window).resize(infinite);
function infinite() {
	var htmlWidth = $('html').width();
	if (htmlWidth >= 750) {
		$("html").css({
			"font-size" : "40px"
		});
	} else {
		$("html").css({
			"font-size" :  40 / 750 * htmlWidth + "px"
		});
	}
}infinite();